warman.]  PORPHYKITIC POTOMAC.  629 
Port  Camden,  A  laska,  coal  at Ann  17,  i,  p  774 
Port  Graham,  Alaska,  Cook  Inlet,  coal  at Ann  17,  i,  pp  785-787 
Port  Orford  quadrangle,  Oregon,  forest  conditions  in Ann  21,  v,  p  576 
Portage  beds,of  New  York,  petrography  and  paleontology  of Bull  16,  pp  67-68 
Portage  sandstone  of  Western  States Bull  80,  p  62 
Porter  (D.) ,  water-power  streams  of  Maine Ann  19,  iv,  pp  34-111 
Porters  Creek  group  of  Tennessee Bull  83,  p  71 ;  Bull  84,  p  333 
Portland  cement  at  World's  Columbian  Exposition MR  1893,  pp  622-623 
in  America,  history  of MR  1891,  pp  535-537 
manufacture  and  statistics  of MR  L892,pp  740-743;  MR  L893,pp 
619-623;  Ann  L6,  iv,pp 580-585;  Ann  17,  mcont,pp 881-893; 
Aim  L8,vcont,pp  L169-1177;  Ann  Mi.  vi  cont,  pp  4X7-494; 
Ann  20,  vi  cont,  pp  539-546;    Ann  21,  vi  cont,pp  393-406 
Portland  group  of  rocks  of  New  Brunswick Bull  86,  pp  230-238 
Portneuf  River,  flow  of,  measurements  of \nn  18,  rv,  pp  333-334;  Ann  20, 
iv,  pp  61,  475-476;  Ann  21,  iv,  pp  404  405;  WS  11,  p  79; 
\VS  Hi,  p  K14;  WS28,  pp  L59,  L68,  L69;  WS  38,  pp  350-351 
Porto  Rico,  geologic  investigations  in \nn  20,  i,  pp  55  56 
mineral  resources  ot Ann  20,  vi  cont,  p|>  771    787 
petroleum  in Ann  21,  vn,  pp  182-183 
survey  of,  estimates  and  recommendations  concerning Vim  21,  i,  pp  19-51,  57 
water  resources,  topography,  climate,  irrigation,  etc.,  of WS  32 
Portugal,  antimony  production  of Ml!  L883  -84,  p  645 
clay  products  of,  at  Maris  Exposition  of  1900 -\nn  21,  vi  cont,  p  389 
copper  production  of....  MM  L882,  p254;  MM  1883  84,  pp  356,  367  -368;  MR1885, 
pp  228,  2.47  238;  MM  L886,pp  L28,  L33-135;  MR  1887,  pp  87, 
95-96;  MM  L888,  p  73;  MM  L889-90,  p  73;  MM  L891,  p  LOO; 
MM  L892,  pp  114,  L15;  MM  L893,  p  86;  Ann  L6,  in,  p  352; 
Ann  17,  in,  pp  117.  L18;  Ann  L8,  v,  pp  219,  220;  Ann  L9,  vi, 
pp  176,  177;  Ann  20,  vi,  pp  202,  203;  Ann  21,  vi,  pp  204,  205 
fossil  plants  of,  literature  of Ann  8,  n,  pp  705-707 
iron-ore  deposits  of Ann  16,  in,  p  113 
Jurassic  and  Cretaceous  flora  of Ann  16,  i,  pp  510-536 
manganese  mines  and  production  of MR  1886, 
p  201;  ME  1889-90,  p  L30;  MR  1892,  p  226;  MR  1893, 
pp  146,  155;  Ann  16,  in,  pp447,  457;  Ann  17,  in,  pp  215,  225; 
Ann  IS,  v.  p  328;  Ann  19,  vi,  p  121;  Ann  21,  vi,  pp  160,  162 
pyrites  production  of MR  1883-84, 
pp  882-884;  MR  1885,  pp  507-508;  MR  1886,  pp  654-656 
tin  deposits  and  production  of Ann  16,  in,  pp  465,  512;  MR  1883-84,  p  618 
Poso  Creek,  California,  flow  of,  measurements  of Bull  140,  pp  274-276 
Post  (W.  S.)  and   Spurr  (J.  E. ),  report  of  Kuskokwim  expedition   (1898), 
Alaska Alaska  (2),  pp  28-39 
Potable  waters  of  eastern  United  States Ann  14,  n,  pp  1-47 
Potassium  and  sodium,  method  for  separation  of,  from  lithium  by  action  of 
amyl  alcohol  on  chlorides,  with  reference  to  similar  sepa- 
ration from  magnesium  and  calcium Bull  42,  pp  73-88 
Potassium  salts,  analyses  of * MR  1887,  pp  632-639 
statistics  of MR  1887,  pp  628-650 
Poteau  Mountain  quadrangle,  Arkansas-Indian  Territory,  physiography  of  .TF  2,  p  10 
Potholes,  glacial,  conditions  for  formation  of,  etc Mon  xxxiv,  pp  324-330 
in  western  Massachusetts Mon  xxix,  pp  532-533,  664-672 
Potomac  beds,  location  and  geology  of Ann  7,  pp 
546-547,  613-616,  636;  Mon  xv,  pp  33-62;  Bull  56,  pp  38-39 
